#include <stdio.h>
#include <stdlib.h>

main() {
    int dividend = 20;
    int divisor = 0;
    int quotient;

    if(divisor == 0) {
        fprintf(stderr, "除数为 0 退出运行...\n");
        exit(-1);
    }
    quotient = dividend / divisor;
    fprintf(stderr, "quotient 变量的值为 ：%d\n", quotient);

    exit(0);
}